ILZRO Classifications of Sandelin Steels

Research carried out by the University of Cardiff in Wales for ILZRO (International Lead Zinc Research Organization) project took an in-depth look at the problem of silicon reactivity and included phosphorous as a r...
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Overlapped Surfaces

It is important to properly vent overlapping and contacting surfaces to prevent trapped moisture (from pickling or flux solution used in the galvanizing process) or gas from flashing to stream, which may result in l...
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Who Is Responsible for Avoiding Embrittlement?

ASTM A143/A143M spells out who is responsible for avoiding embrittlement. The responsibility lies on the designer, fabricator, and the galvanizer, but each party has different responsibilities. Choosing steel approp...
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Is hot-dip galvanized steel considered anti-sparking?

Yes, hot-dip galvanized coatings are anti-sparking and nonincendiary as are most zinc coatings. The exception is zinc coating alloys that have 30 to 55% aluminum. It is important to realize if the galvanized steel i...
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Can 4130 steel be successfully galvanized?

4130 steel is a chromoly steel. Steels of this chemistry have presented some adherence problems in the past when galvanized. The galvanized coating developed in some areas but not others. It would be best to try ga...
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Hydrogen Embrittlement

Hydrogen embrittlement occurs when steel cracks due to hydrogen that is trapped between the grains of the steel. Although steel commonly absorbs hydrogen during the hot-dip galvanizing process, it is usually expelle...
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Bracing (temporary and permanent) of steel fabrications for galvanizing

Most fabrications lend themselves well to the galvanizing process, including asymmetrical designs or structures containing sections of unequal thickness. It is important to understand that, because during...
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Methods to Reduce the Occurrence of Strain-Age Embrittlement

There are several ways to reduce the occurrence of strain-age embrittlement, but all methods focus on one aspect – reducing the stresses induced into the steel prior to galvanizing. Instead of cold working, which in...
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Why is steel chemistry important in the hot-dip galvanizing process?

Galvanized coatings are formed by a chemical process during which steel and zinc metallurgically bond, forming a series of corrosion-inhibiting, highly abrasion-resistant zinc/iron alloy layers. Galvanized coatings...
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How much does galvanizing cost?

Due to the relatively stable price of zinc and technology /process efficiencies in the last 20 years, hot-dip galvanizing has steadily become more competitive, and often less expensive, on an initial basis than othe...
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